I need to add markers at every 300 splits at once

I have an audio separated for 300 hundred split. Then, I need to add 300 marker at every split. It's very exhausted to add marker at every split manually. I need a one solution of these following options.1 - a shortcut allow me to navigate to next split so I can save time of adjusting the pointer at every split of 300 by the mouse and really less boredom.2 - an option that allows me to add markers at every 300 splits at once named by serialized numbers like 0,1,2,3,4,5, .. etc

could you post a screenshot showing a typical project zoomed out [ctl-shift-7]; or perhaps do a short screencast, hosted on screencast,com, describing the project, and what you need to accomplish with the markers?

all audio parts are adjacent without spaces or time between. and I need markers to produce multiple videos based on markers. simply, I have 300 audios and I need to convert them all with one picture to 300 videos at once.